selector

问题 All I want is that on item1 click to hide all items where id isn't item1 . The html: <span id="select1">item1</span> <span id="2">item1</span> <div style="clear:both"></div> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item2"> <img src="http://www.lorempixel.com

问题 All I want is that on item1 click to hide all items where id isn't item1 . The html: <span id="select1">item1</span> <span id="2">item1</span> <div style="clear:both"></div> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item1"> <img src="http://www.lorempixel.com/100/100" id="item2"> <img src="http://www.lorempixel.com

问题 I receive a memory leak for the line containing the sortedArrayUsingSelector definition. Does anybody know what might be the problem? @property (nonatomic, retain) NSArray *indexLetters; ... NSMutableDictionary *indexedCategories = [[NSMutableDictionary alloc] init]; ... self.indexLetters = [[indexedCategories allKeys] sortedArrayUsingSelector:@selector(compare:)]; [indexedCategories release]; 回答1: It could be because you're not releasing the indexLetters variable in dealloc . 来源： https:/

问题 I am trying to remove an ImageButton's background in only the default state. I'd like the pressed and selected states to behave as usual so that they look correct on different devices, which use different colors for the pressed and selected states. Is there any way to set an ImageButton's background default state's drawable without affecting the pressed and selected states? I've tried to do this with a selector, but it does not appear to allow you to use the default drawables for some states

问题 I am trying to remove an ImageButton's background in only the default state. I'd like the pressed and selected states to behave as usual so that they look correct on different devices, which use different colors for the pressed and selected states. Is there any way to set an ImageButton's background default state's drawable without affecting the pressed and selected states? I've tried to do this with a selector, but it does not appear to allow you to use the default drawables for some states

问题 I have an ImageButton in my app and I need to change the tint of the image when the button is pressed/focused . I have the ImageButton set to get its src from an XML file which as follows: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- pressed --> <item android:state_pressed="true" android:tint="@color/black" android:drawable="@drawable/search" /> <!-- focused --> <item android:state_focused="true" android:tint="@color/black"

问题 I have an ImageButton in my app and I need to change the tint of the image when the button is pressed/focused . I have the ImageButton set to get its src from an XML file which as follows: <?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- pressed --> <item android:state_pressed="true" android:tint="@color/black" android:drawable="@drawable/search" /> <!-- focused --> <item android:state_focused="true" android:tint="@color/black"

问题 I am new to iOS/Swift so please bear with me. I have a TextField, timeTextField, and want to display a TimePicker on click. All this is working property but when another element is selected the app crashes why does it crash? UPDATE 1: updated code code: func setupTimePicker(){ datePickerView.datePickerMode = UIDatePickerMode.time datePickerView.removeFromSuperview() timeTextField.inputView = datePickerView datePickerView.addTarget(self, action: #selector(self.datePickerValueChanged(sender:)),

问题 My DOM is as follows: http://jsfiddle.net/pimvdb/AHJXk/1/. <table> <tr> <td> <input type="text"><input type="text"> </td> <td> <input type="text"><input type="text"> </td> </tr> <tr> <td> <input type="text"><input type="text"> </td> <td> <input type="text"><input type="text"> </td> </tr> </table> I'm trying to select all input s in the second td of each tr , i.e. four in total. I thought the following selector would work: $('table tr td:nth-child(2) input') But it only returns the first input

问题 I have a custom class MyClass that is essentially made up of several NSMutableArrays and no other variables. I have an entity MyEntity that has an ivar that is of MyClass. When I try to save the entity, I get this stack dump: 0 CoreFoundation 0x0118ebe9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x012e35c2 objc_exception_throw + 47 2 CoreFoundation 0x011906fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x01100366 ___forwarding___ + 966 4 CoreFoundation 0x010fff22